LG General Wall Mounted-Inverter Type - Manual (Page 53)

Service Manual 53
Part 4 Trouble Shooting
7
• Supplied power is not normal
• Indoor/outdoor fan is locked
• Too much refrigerant
• Defect in current sensing circuit in outdoor pcb assembly
Over current Error
(CT2)
Supplied voltage to
Outdoor pcb is about
AC 208~230V ?
Does indoor / outdoor fan work
normally ?
YES
No
Check power source
No
Check indoor / outdoor fan and
adjust.
Check flow
Refrigerant pressure is right ?
YES
No
Check refrigerant pressure
and adjust.
Current sensing circuit is right ?
YES
No
Check current sensing circuit.
- check CT is damaged in outdoor pcb
(output wire is disconnected to pin or not)
- BD01N is inserted in right position
(refer marking on pcb and component)
- Spec of R01N (1k
Ω), R02N (1.65kΩ) is correct
- Direction of diode (D01N, D02N) is right
Description Cause of error Error code